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15#include <linux/module.h>
16#include <linux/ioport.h>
17#include <linux/io.h>
18#include <linux/platform_device.h>
19#include <linux/init.h>
20#include <linux/serial_core.h>
21#include <linux/serial.h>
22
23#include <asm/irq.h>
24#include <mach/hardware.h>
25#include <plat/regs-serial.h>
26#include "samsung.h"
27
28static int s5pv210_serial_setsource(struct uart_port *port,
29 struct s3c24xx_uart_clksrc *clk)
30{
31 struct s3c2410_uartcfg *cfg = port->dev->platform_data;
32 unsigned long ucon = rd_regl(port, S3C2410_UCON);
33
34 if ((cfg->clocks_size) == 1)
35 return 0;
36
37 if (strcmp(clk->name, "pclk") == 0)
38 ucon &= ~S5PV210_UCON_CLKMASK;
39 else if (strcmp(clk->name, "uclk1") == 0)
40 ucon |= S5PV210_UCON_CLKMASK;
41 else {
42 printk(KERN_ERR "unknown clock source %s\n", clk->name);
43 return -EINVAL;
44 }
45
46 wr_regl(port, S3C2410_UCON, ucon);
47 return 0;
48}
49
50
51static int s5pv210_serial_getsource(struct uart_port *port,
52 struct s3c24xx_uart_clksrc *clk)
53{
54 struct s3c2410_uartcfg *cfg = port->dev->platform_data;
55 u32 ucon = rd_regl(port, S3C2410_UCON);
56
57 clk->divisor = 1;
58
59 if ((cfg->clocks_size) == 1)
60 return 0;
61
62 switch (ucon & S5PV210_UCON_CLKMASK) {
63 case S5PV210_UCON_PCLK:
64 clk->name = "pclk";
65 break;
66 case S5PV210_UCON_UCLK:
67 clk->name = "uclk1";
68 break;
69 }
70
71 return 0;
72}
73
74static int s5pv210_serial_resetport(struct uart_port *port,
75 struct s3c2410_uartcfg *cfg)
76{
77 unsigned long ucon = rd_regl(port, S3C2410_UCON);
78
79 ucon &= S5PV210_UCON_CLKMASK;
80 wr_regl(port, S3C2410_UCON, ucon | cfg->ucon);
81 wr_regl(port, S3C2410_ULCON, cfg->ulcon);
82
83
84 wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
85 wr_regl(port, S3C2410_UFCON, cfg->ufcon);
86
87 return 0;
88}
89
90#define S5PV210_UART_DEFAULT_INFO(fifo_size) \
91 .name = "Samsung S5PV210 UART0", \
92 .type = PORT_S3C6400, \
93 .fifosize = fifo_size, \
94 .has_divslot = 1, \
95 .rx_fifomask = S5PV210_UFSTAT_RXMASK, \
96 .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \
97 .rx_fifofull = S5PV210_UFSTAT_RXFULL, \
98 .tx_fifofull = S5PV210_UFSTAT_TXFULL, \
99 .tx_fifomask = S5PV210_UFSTAT_TXMASK, \
100 .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \
101 .get_clksrc = s5pv210_serial_getsource, \
102 .set_clksrc = s5pv210_serial_setsource, \
103 .reset_port = s5pv210_serial_resetport
104
105static struct s3c24xx_uart_info s5p_port_fifo256 = {
106 S5PV210_UART_DEFAULT_INFO(256),
107};
108
109static struct s3c24xx_uart_info s5p_port_fifo64 = {
110 S5PV210_UART_DEFAULT_INFO(64),
111};
112
113static struct s3c24xx_uart_info s5p_port_fifo16 = {
114 S5PV210_UART_DEFAULT_INFO(16),
115};
116
117static struct s3c24xx_uart_info *s5p_uart_inf[] = {
118 [0] = &s5p_port_fifo256,
119 [1] = &s5p_port_fifo64,
120 [2] = &s5p_port_fifo16,
121 [3] = &s5p_port_fifo16,
122};
123
124
125static int s5p_serial_probe(struct platform_device *pdev)
126{
127 return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]);
128}
129
130static struct platform_driver s5p_serial_driver = {
131 .probe = s5p_serial_probe,
132 .remove = __devexit_p(s3c24xx_serial_remove),
133 .driver = {
134 .name = "s5pv210-uart",
135 .owner = THIS_MODULE,
136 },
137};
138
139static int __init s5pv210_serial_console_init(void)
140{
141 return s3c24xx_serial_initconsole(&s5p_serial_driver, s5p_uart_inf);
142}
143
144console_initcall(s5pv210_serial_console_init);
145
146static int __init s5p_serial_init(void)
147{
148 return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf);
149}
150
151static void __exit s5p_serial_exit(void)
152{
153 platform_driver_unregister(&s5p_serial_driver);
154}
155
156module_init(s5p_serial_init);
157module_exit(s5p_serial_exit);
158
159MODULE_LICENSE("GPL");
160MODULE_ALIAS("platform:s5pv210-uart");
161MODULE_DESCRIPTION("Samsung S5PV210 UART Driver support");
162MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
163
